Breathing apparatus



FIG. 1 is a perspective view showing front, top and side surfaces of a breathing apparatus.

FIG. 2 is a front view thereof.

FIG. 3 is a rear view thereof.

FIG. 4 is a top view thereof.

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a right side view thereof, the left side being a mirror image of the right side.

The broken lines in the drawings depict portions of the breathing apparatus that form no part of the claimed design. 

CLAIM The ornamental design for a breathing apparatus, as shown and described. 